Confirm the client only asks the homeserver's /preview_url for links in received/sent timeline events, never for text sitting in the composer (some clients pre-fetch on typing, which leaks every URL you paste-then-delete). Check RoomInput, the scheduled-message modal and the edit composer. If any path pre-fetches, remove it.
Confirm the client only asks the homeserver's `/preview_url` for links in **received/sent** timeline events, never for text sitting in the composer (some clients pre-fetch on typing, which leaks every URL you paste-then-delete). Check `RoomInput`, the scheduled-message modal and the edit composer. If any path pre-fetches, remove it.
jared
added this to the Features 2026-Q4 milestone 2026-09-17 16:26:18 -04:00
Verified on the local dev homeserver with Playwright, capturing every preview_url request:
typed check this https://example.org/typing-only?x=1 and https://wikipedia.org/wiki/Typing into the composer with URL previews enabled, waited 4 s → 0 preview requests;
pressed Enter → 2 preview requests, one per link, only for the sent message.
Previews are only fetched by UrlPreviewCard when rendering a timeline event (mx.getUrlPreview(url, ts)), never from the composer. Closing.
Verified on the local dev homeserver with Playwright, capturing every `preview_url` request:
- typed `check this https://example.org/typing-only?x=1 and https://wikipedia.org/wiki/Typing ` into the composer with URL previews enabled, waited 4 s → **0** preview requests;
- pressed Enter → 2 preview requests, one per link, only for the sent message.
Previews are only fetched by `UrlPreviewCard` when rendering a timeline event (`mx.getUrlPreview(url, ts)`), never from the composer. Closing.
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Confirm the client only asks the homeserver's
/preview_urlfor links in received/sent timeline events, never for text sitting in the composer (some clients pre-fetch on typing, which leaks every URL you paste-then-delete). CheckRoomInput, the scheduled-message modal and the edit composer. If any path pre-fetches, remove it.Verified on the local dev homeserver with Playwright, capturing every
preview_urlrequest:check this https://example.org/typing-only?x=1 and https://wikipedia.org/wiki/Typinginto the composer with URL previews enabled, waited 4 s → 0 preview requests;Previews are only fetched by
UrlPreviewCardwhen rendering a timeline event (mx.getUrlPreview(url, ts)), never from the composer. Closing.